JPS629837A - Resilient ring mounting device - Google Patents

Abstract

PURPOSE:To position a resilient ring accurately in piston groove and mount by providing a head for pressing one endface of resilient ring and a slider contactable against the other endface of resilient ring at the restricting position of head. CONSTITUTION:The jig 25 is formed at the leading edge section of plural air- cylinders 26 planted on a turn table 23 while having the shaft section 27 to be fitted with piston P and the section 28 for supporting one endface of piston P from below. The slider 30 is formed tubular and fitted slidably over the supporting section 28 of jig 25 to support the endface of seal ring R at the upper end 30b while secured through a pin 33 to the piston head 32 of piston 31 reciprocal in the air-cylinder 26. The leading edge section 41a of head 40 arranged annularly with plural fingers 41 is positioned in flush with the upper sideface 10b of piston P through stopper member.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a device for reducing the diameter of an expanded elastic ring and installing it in the above-mentioned groove.

In particular, in the case of a ring with strong viscosity, even if it is brought into a groove, the diameter will shrink immediately and it will not return to its original shape. The present invention relates to a mounting device used for mounting such a highly viscous elastic ring.

[Conventional technology]

Conventionally, as a means for attaching an elastic ring to a member to be attached,
For example, to explain the case where a seal ring as an elastic ring is attached to a piston as a member to be attached used in a hydraulic cylinder or a pneumatic cylinder, as shown in FIG. 7(a).
The means shown in (b) and (c) are known.

In FIGS. 7(a), (b), and (c), reference numeral 1 is a jig for positioning and holding the piston P, 2 is a guide member, and R is a seal ring made of fluororesin or the like. The guide member 2 includes a guide taper portion 3 having a substantially truncated conical shape and a base portion 3a having the same diameter as the piston P, and a base portion 3a of the guide taper portion 3.
It consists of a shaft portion 6 that protrudes from the piston P and fits into the hole 5 of the piston P.

First, as shown in FIG. 7(a), the piston P
is positioned on the jig 1, the guide member 2 is fitted to the piston P, and the seal ring R is fitted to the guide member 2.
Insert. Next, as shown in FIG. 7(b), the seal ring R is pushed with the cylindrical pushing member 8, and the guide tapered part 3 of the guide member 2 is inserted and expanded, and the groove lO of the piston P is expanded. Bring it to the side. Thereafter, as shown in FIG. 7(C), the seal ring R is fitted into the groove 10 using the fitting tool 11. This fitting 11 is a cylindrical body having an inner diameter d slightly larger than the outer diameter of the piston P, and its opening is configured as a tapered hole 12 with a chamfered shape. Then, this fitting tool 11 is fitted onto the piston P, and the diameter of the seal ring R is gradually reduced in the tapered hole portion 12, so that it is fitted into the groove 10 so that it has the same outer diameter as the inner diameter d.

[Problem that the invention seeks to solve]

However, with this conventional mounting means, there is a problem in that the seal ring R often fails to be mounted, and the work must be redone each time.

This is because when the seal ring R is pushed by the pushing member 8, the seal ring R is twisted due to sliding resistance with the guide member 2, and when it is brought to the side of the groove 10, its posture is distorted. Even if you press with the fitting tool 11, the groove 1 is completely closed.
This is because there are cases where it does not fit in the correct position or is installed at an angle. In addition, since the tapered hole portion 12 of the fitting 11 slides against the sealing surface of the seal ring H, the sealing surface may be damaged or the seal ring R may be installed at an angle to the groove 10 due to the frictional resistance. It is from.

Therefore, the technical problem of the present invention is to attach the seal ring R to the groove 1.
0, and also allows the seal ring R to be fitted into the groove 10 without sliding contact.

[Means for solving problems]

The technical means of the present invention for solving such problems includes a jig for positioning and holding the member to be mounted, and a jig for positioning and holding the member to be mounted, and a jig for positioning and holding the member to be mounted; a head that brings the elastic ring to the direction; a restraining means that restrains the head in the brought position; a support member that abuts the other end surface of the elastic ring at the head restraining position;
The fitting means has a plurality of holding members that surround the groove as a whole and can extend toward the groove.

〔Example〕

Hereinafter, an elastic ring mounting device according to an embodiment of the present invention will be described based on the accompanying drawings.

The mounting device S shown in FIGS. 1 to 3 is for mounting a seal ring R on a piston P similar to the conventional one, and its basic configuration is an index unit 20, a head 40, and a fitting device as a fitting means. It consists of a mounting 60.

The index unit 20 is installed on a machine stand 21 and includes a drive section 22 and a turntable 23. In FIG. 3, reference numeral 25 is a jig, and the turntable 23
A shaft portion 27, into which the piston P fits, and a support portion 28, which supports one end surface of the piston P from below, are formed at the tip of a plurality of air cylinders 26 erected. Reference numeral 29 denotes a guide member, which has a base 29a having the same diameter as the piston P and is formed in a substantially truncated conical shape.
mated to.

Reference numeral 30 denotes a slider as a support member, which is formed into a cylindrical shape and slidably fits around the support portion 28 of the jig 25, and supports the end surface of the seal ring R with its upper end 30b. Piston 3 reciprocating within air cylinder 26
It is fixed to the piston head 32 of No. 1 with a pin 33. This pin 33 passes through a long hole 34 provided in the air cylinder 26. Reference numeral 35 denotes a double nut type stopper screwed on the outside of the air cylinder 26, and is a stopper of the slider 30.
The lower end 30a of is set so that it can come into contact with the lower end 30a. The slider 30 is capable of reciprocating between the top dead center position A of the piston 31 and the contact position B of the stopper 35, and its upper end 30b is located at the top dead center position A at the base 2 of the guide member 29.
9a, and is set to be flush with the lower surface 10a of the groove 10 of the piston P at the contact position B.

Further, the piston 31 is always urged toward the top dead center position A side by air, and is released from this urging by a control valve not shown, so that it can freely descend. In addition, the symbols 37 and 38 are the jig 25.
and an air vent hole opened in the guide member 29.

As shown in FIGS. 3 and 4, the head 40 has a plurality of fingers 41 arranged in an annular manner, and is coaxial with a piston P on one jig 25 carried by a turntable 23. Set. The fingers 41 are supported by a pin 44 on a bracket 43 of a bracket block 42, and are mutually urged inwardly by a ring-shaped spring 45 so as to be in constant contact with a stopper 46. set to become something. The tip of each finger 41 is bent into an L-shape, and the tip 41a is flat so that it can abut against one end surface of the seal ring R.

Further, as shown in FIGS. 1 and 2, the bracket block 42 of the head 40 is attached to an air cylinder device 48 attached to a stand 47 via a ram 49 so as to be movable up and down. Reference numeral 50 denotes a stopper member, and the piston rod 48a projects from the upper end side of the air cylinder device 48.
A piston rod 48 is attached to the piston rod 48 and protrudes from the lower end side.
While adjusting the stroke of b, the tip 4 of the head 40
1a is positioned flush with the upper surface tab of the groove 10 of the piston P. This position is now presser foot position C. Further, the air cylinder device 48 and the stopper member 50 are also configured as restraining means, and stop the head 40 at the holding position C for a predetermined period of time. Reference numeral 51 denotes a guide that slidably supports a pair of rods 53 attached to the piston rod 48b via a mounting plate 52.

Then, due to the expansion of the air cylinder device 48, the head 40
is lowered to the holding position C, and the fingers 41 are expanded following the taper of the guide member 29.

The fitting device 60, as shown in FIG.
1 and a drive device 63 for driving the same.

The holding member 61 is a pair of plates 61a.

61b, and a hole 62 having a slightly larger diameter than the outer diameter of the piston P and in contact with the outer circumferential surface of the seal ring R is formed in the mating portion thereof.

In the drive device 63, reference numerals 64a and 64b are sliders, and a pair of rods 66 are installed on the support member 65.
is slidably inserted into. Also, this slider 64a
, 64b, the plates 61a and 61b are attached so as to be able to butt against each other. Further, the sliders 64a and 64b are provided with racks 67a and 67b, respectively, which extend in the axial direction of the rod 66 and mesh with the pinion gear 68. This pinion gear 68 is rotatably attached to the pedestal 65a of the support member 65, and transmits the sliding motion of one slider 64b to the other slider 64a in the opposite direction. code 70
is an air cylinder, and the piston rod 70a thereof is attached to the support member 65 along the axial direction of the rod 66. Further, the tip of the piston rod 70a is fixed to one slider 64a. And piston rod 7
Due to the extension of 0a, the presser member 61 presses both plates 61a
, 61b are abutted to form the hole 62, and the seal ring R is set at the fitting position D (solid line in the figure) in which the seal ring R is fitted into the groove 10, while the piston rod 70a is reduced to the separated position E (
Two points in the diagram! a). And the fitting device 60
As shown in FIG.
It is attached to the stand 47 so that the groove 10 of the upper piston P can be surrounded by the hole 62.

Therefore, the seal ring R is shown in FIGS. 3 and 6(a) (
b) As shown in (c), it is installed as follows. First, the piston P is placed on the jig 25 on the turntable 23.
The guide member 29 is fitted onto the piston P, and the seal ring R is fitted onto the guide member 29 using a parts feeder (not shown), as shown in FIG. 6(a). It's crowded. In this state, the slider 30 is at the top dead center position A, and the holding member 61 of the fitting device 60 is set at the separated position E.

Next, the turntable 23 is rotated to position the piston P below the head 40. And Fig. 6 (b
), the air cylinder device 4B operates to lower the head 40. In this case, as shown in FIG. 3, the tip 41a of the finger 41 of the head 40 contacts one end surface of the seal ring R, and the guide member
Press the seal ring R while expanding it along the tapered surface. At this time, the seal ring R is expanded until it has the same diameter as the outer diameter of the piston P, and the other end surface contacts the upper end 30b of the slider 30 at 8 times. Therefore, the seal ring R is held between the fingers 41 and the slider 30.

In this state, the pressure in the air cylinder 26 is reduced by the control valve, and the slider 30 can be lowered. Then, as shown in FIG. 6(b), the head 40 further pushes the seal ring R and the slider 30 and descends. In this case, the seal ring R is connected to the finger 41 and the slider 30.
Since the inner side of the seal ring R is held between the seal ring R and the seal ring R, the inner side of the seal ring R is not twisted by the sliding resistance and can be moved with a constant posture. Then, the head 40 is set at the holding position C, and the slider 30 is set at the contact position B. In this position, the seal ring R is positioned to the side of the groove 10 of the piston P.

Thereafter, the air cylinder 70 of the fitting device 60 is operated to set the holding member 61 from the separated position E to the fitting position, as shown in FIG. In this case, as shown in FIG. 6(C), both plates 61a and 61b advance toward the groove 10, surround the side surface of the seal ring R with the hole 62, and seal in the groove 10 while contacting this side surface. This will reduce the diameter of ring R and push it in. At this time, the seal ring R is kept in a constant position by the fingers 41 and the slider 30 since the fingers 41 are stopped at the holding position C for a predetermined time. Seal ring H only touches the side of H.
Situations such as scratches are prevented, and since the seal ring R extends toward the groove 10 so as to surround the seal ring R, the seal ring R is prevented from tilting.

And seal ring R (7)! When the outfit is finished.

The head 40, slider 30, and fitting device 60 return to their original positions and are ready for the next piston P to be transported by the rotation of the turntable 23.

〔Effect of the invention〕

As explained above, according to the elastic ring mounting device of the present invention, the elastic ring can be fitted into the groove without sliding contact while accurately positioning the elastic ring with respect to the groove. It is possible to significantly reduce the number of installation defects.

[Brief explanation of drawings]

1 and 2 are front and side views showing a mounting device according to an embodiment of the present invention, FIG. 3 is a cross-sectional view of main parts showing the structure of a jig and a head, and FIG. 4 is in the middle of FIG. A sectional view taken along the line IV-IT, FIG. 5 is a plan view showing the structure of the fitting device, and FIG. 6(a)
(b) and (c) are main part cross-sectional views showing the seal ring mounting process using this mounting device, and Fig. 7(a), (b), and (c) show an example of the conventional seal ring mounting process using the mounting device. It is a sectional view shown together with a structure. R... Seal ring (elastic ring) P... Piston (mounted member) 10... Groove S... Mounting device 25... Jig 30... Slider (supporting member) 40... head

Claims (1)

[Claims] A device that reduces the diameter of an expanded elastic ring and attaches it to a groove of a member to be mounted, which includes a jig for positioning and holding the member to be mounted, and a groove of the member to be mounted by pressing one end surface of the elastic ring. a head that brings the elastic ring to the side, a restraining means that restrains the head in this brought position, a support member that abuts the other end surface of the elastic ring at the head restraining position, and a support member that as a whole surrounds the groove. An elastic ring mounting device comprising a mounting means having a plurality of holding members that can advance toward a groove.